This design shows the CC254x series Bluetooth® low power (BLE) wireless microcontroller (MCU) + F meander type antenna, the devices are compact and can be welded to the existing PCB. The reference design is all I can access the BLE wireless MCU / O, in order to assess BLE connect existing systems. The design is compatible with Texas Instruments Royalty Free BLE protocol stack, the stack contains a sample application that can speed up the evaluation process.